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Application: Variable Expression of Motility Genes in Tumor Cells W. Wang, et al. “Tumor cells caught in the act of invading: their strategy for enhanced cell motility,” TRENDS in Cell Bio. 15(3): pp. 138-145 (2005) “There is, however, the possibility that these expression patterns reflect the noninvasive cells that make up the bulk of the tumor mass and that the expression signature of invasive tumor cells – arguably the motile population essential for metasasis – might be masked.” “If a specific combination of gene expression patterns can be correlated with metastic ability, however, then such analyses can be predictive of metastatic outcome…”